package pattern.interpreter;

public class Client {
    public static void main(String[] args) {
        Context context = new Context();
        
        Variable a = new Variable("a");
        Variable b = new Variable("b");
        Variable c = new Variable("c");
        Variable d = new Variable("d");
        
        context.assign(a,1);
        context.assign(b,2);
        context.assign(c,3);
        context.assign(d,4);

        AbstractExpression expression = new Plus(new Minus(new Plus(a,b),c),d);

        int interpret = expression.interpret(context);
        System.out.println(expression.toString() + "=" +  interpret);
    }
}
